Azemar letters and entires (28 ex.) between 1863 and 1868 all with the senders cachet " J.C. Azemar / 42 St Mary Axe / London ", Azemar later produced his famous cancelling machine which was trialed in London in 1869 and again in 1871-1872, a few items actually signed by J.C. Azemar, a very interesting group. Provenance : The Amsterdam archive